package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
        System.out.println("当前线程的id："+Thread.currentThread().getId());
        Employee employee = new Employee();

        //因为employeeDTO里面的属性，Employee这个里面都有，所以直接用--对象属性拷贝   （属性名字必须要一致）
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置账号的状态  1：表示正常，2：表示被锁定
        //应为直接写入数字的话，不方便后期的维护，所以这里设置了一个常量类
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码，默认为123456 ---  要对密码进行md5进行加密
        //密码也是常量类
        String password = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(password);

        //添加创建时间
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setCreateTime(LocalDateTime.now());
//
//        //设置当前记录创建人id和修改人id ---
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insertSave(employee);


    }

    //员工分页查询
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询 --- 使用的是一个插件  com.github.pagehelper
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //因为使用了这个插件，所以要遵循他的规则，返回值是固定的
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        //返回数据
        return new PageResult(total,result);
    }

    //启用与禁用员工的账户
    @Override
    public void startOrStop(Integer status, Long id) {
        //为了扩展性强
        //方法一：
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //方法二：  这个需要在Employee上面加Builder注解
        Employee build = Employee.builder()
                .status(status)
                .id(id)
                .build();
        //1：根据SQL语句查找用户，并修改用户状态
        employeeMapper.update(employee);

    }

    //根据id查询员工
    @Override
    public Employee idEmployee(Integer id) {
        //用SQL语句查询
        Employee employee = employeeMapper.selectIdEmployee(id);
        employee.setPassword("********");
        return employee;
    }

    //修改员工信息
    @Override
    public void updateEmployeeImg(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //把修改时间改一下
//        employee.setUpdateTime(LocalDateTime.now());
        //设置当前记录创建人id与修改id---
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        //把employee对象传送到SQL
        employeeMapper.update(employee);

    }

}
